Answer:
8 maybe
Step-by-step explanation:
Answer:
correct you are
Step-by-step explanation:
Answer:2
Step-by-step explanation:
Given
Physics problem requires 20 min
Math problem require 10 min
suppose x question of Physics and y questions of Math are done
so according to the question
Time require for x Physics problem
Time require for y Math problem
so,
On solving (1) and (2)
we get and
Maximum no of Physics question which can be solved is 2
X+y=10, x=10-y
4(10-y)+6y=332
solve the next parts yourself
Substitution is to use one variable to express another variable in order to eliminate one variable in the original equation